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Tokenizer.cs
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204 lines (173 loc) · 5.93 KB
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using SER.Code.Exceptions;
using SER.Code.Extensions;
using SER.Code.Helpers.ResultSystem;
using SER.Code.ScriptSystem;
using SER.Code.TokenSystem.Slices;
using SER.Code.TokenSystem.Structures;
using SER.Code.TokenSystem.Tokens;
using SER.Code.TokenSystem.Tokens.ExpressionTokens;
using SER.Code.TokenSystem.Tokens.ValueTokens;
using SER.Code.TokenSystem.Tokens.VariableTokens;
namespace SER.Code.TokenSystem;
public static class Tokenizer
{
public static readonly Type[] OrderedImportanceTokensFromSingleSlices =
[
typeof(KeywordToken),
typeof(BoolToken),
typeof(MethodToken),
typeof(FlagToken),
typeof(FlagArgumentToken),
typeof(ColorToken),
typeof(CommentToken),
typeof(SymbolToken),
typeof(NumberToken),
typeof(PlayerVariableToken),
typeof(LiteralVariableToken),
typeof(CollectionVariableToken),
typeof(ReferenceVariableToken),
typeof(DurationToken),
typeof(RunFunctionToken)
];
public static readonly Type[] OrderedImportanceTokensFromCollectionSlices =
[
typeof(ReferenceVariableExpressionToken),
typeof(PlayerExpressionToken),
typeof(MethodExpressionToken),
typeof(LiteralVariableExpressionToken),
typeof(ParenthesesToken),
typeof(TextToken)
];
public static Line[] GetInfoFromMultipleLines(string content)
{
List<Line> outList = [];
var lines = content.Split(["\r\n", "\n", "\r"], StringSplitOptions.None);
for (uint index = 0; index < lines.Length; index++)
{
var line = lines[index];
var info = new Line
{
RawRepresentation = line,
LineNumber = index + 1
};
outList.Add(info);
}
return outList.ToArray();
}
public static Result SliceLine(Line line)
{
if (SliceLine(line.RawRepresentation).HasErrored(out var err, out var slices))
{
return err;
}
line.Slices = slices.ToArray();
return true;
}
/// <summary>
/// Decides the line if it's collection slice or single slice.
/// </summary>
/// <param name="line">Line to parse</param>
/// <returns>The slices for the specificalious line</returns>
public static TryGet<IEnumerable<Slice>> SliceLine(string line)
{
List<Slice> outList = [];
Slice? currentSlice = null;
foreach (char currentChar in line)
{
if (currentSlice is null)
{
if (char.IsWhiteSpace(currentChar))
{
continue;
}
currentSlice = CollectionSlice.CollectionStarters.Contains(currentChar)
? new CollectionSlice(currentChar)
: new SingleSlice(currentChar);
continue;
}
if (currentSlice.CanContinueAfterAdd(currentChar))
{
continue;
}
if (currentSlice.VerifyState().HasErrored(out var error))
{
return error;
}
outList.Add(currentSlice);
currentSlice = null;
}
if (currentSlice is not null)
{
if (currentSlice.VerifyState().HasErrored(out var error))
{
return error;
}
outList.Add(currentSlice);
}
return outList;
}
public static Result TokenizeLine(Line line, Script scr)
{
if (TokenizeLine(line.Slices, scr, line.LineNumber).HasErrored(out var err, out var tokens))
{
return err;
}
line.Tokens = tokens;
return true;
}
public static TryGet<BaseToken[]> TokenizeLine(string line, Script scr, uint? lineNum)
{
if (SliceLine(line).HasErrored(out var sliceError, out var slices))
{
return sliceError;
}
return TokenizeLine(slices, scr, lineNum);
}
public static TryGet<BaseToken[]> TokenizeLine(IEnumerable<Slice> slices, Script scr, uint? lineNum)
{
var sliceArray = slices.ToArray();
List<BaseToken> outList = [];
foreach (var slice in sliceArray)
{
if (GetTokenFromSlice(slice, scr, lineNum).HasErrored(out var error, out var token))
{
return $"Value '{slice.RawRep}' is invalid.".AsError() + error.AsError();
}
outList.Add(token);
}
return outList.ToArray();
}
public static TryGet<BaseToken> GetTokenFromSlice(Slice slice, Script? scr, uint? lineNum)
{
var tokenCollection = slice is CollectionSlice
? OrderedImportanceTokensFromCollectionSlices
: OrderedImportanceTokensFromSingleSlices;
foreach (var tokenType in tokenCollection)
{
var token = tokenType.CreateInstance<BaseToken>();
switch (token.TryInit(slice, scr!, lineNum))
{
case BaseToken.Success: return token;
case BaseToken.Ignore: continue;
case BaseToken.Error err: return err.Message;
default: throw new AndrzejFuckedUpException();
}
}
var unspecified = new BaseToken();
unspecified.TryInit(slice, scr!, lineNum);
return unspecified;
}
public static TryGet<BaseToken> GetTokenFromString(string str, Script? scr, uint? lineNum)
{
if (SliceLine(str).HasErrored(out var err, out var slices))
{
return err;
}
var bettaSlices = slices as Slice[] ?? slices.ToArray();
if (bettaSlices.Length > 1)
{
return $"Value '{str}' contains multiple slices.";
}
return GetTokenFromSlice(bettaSlices.First(), scr, lineNum);
}
}